The requirements for a TN support letter come from 8 CFR 214.6, which tells the employer to address five things in writing: the USMCA profession the applicant will practice, a description of the professional duties, the anticipated length of stay, the applicant’s educational qualifications or credentials, and the arrangements for pay.1eCFR. 8 CFR 214.6 – Citizens of Canada or Mexico Seeking Temporary Entry Under USMCA to Engage in Business Activities at a Professional Level Customs and Border Protection restates the same list in its guidance for Mexican citizens, confirming that the job title, duties, length of stay (up to three years), and salary all need to appear.2U.S. Customs and Border Protection. How to Obtain TN Status as a Mexican Citizen Miss any one of the five and the application can be refused at the border or at the consulate.
The Five Elements, One by One
Give each element its own clearly labeled section. Officers reviewing TN packets are working a queue and want to find each item quickly. A letter that buries the salary in paragraph three of a duty description is harder to approve than one that puts pay under its own heading.
The USMCA Profession
Name the profession using the exact title from Appendix 2 to Annex 16-A of USMCA Chapter 16. The appendix covers roughly 60 professions in four groups: general professions such as Accountant, Architect, Engineer, Computer Systems Analyst, and Management Consultant; medical and allied professions such as Registered Nurse, Pharmacist, Dentist, and Psychologist; scientists including Chemist, Biologist, Geologist, and Economist; and teachers at the college, seminary, or university level.3Office of the U.S. Trade Representative. USMCA Chapter 16 Temporary Entry for Business Persons – Appendix 2 Professionals If the internal job title doesn’t match a listed profession, the letter has to map the role to the closest qualifying one and show the fit through the duties.
Description of Duties
Write the duties concretely enough that an officer can see the work genuinely requires the credential tied to the named profession. The State Department’s Foreign Affairs Manual stresses that the nature of the actual duties controls, not the title on the business card.4U.S. Department of State Foreign Affairs Manual. 9 FAM 402.17 USMCA Professionals – TN and TD Visas Calling someone a Systems Engineer will not pass scrutiny if the daily work is troubleshooting desktop computers, because the described work isn’t professional-level engineering. Vague duty descriptions are one of the most common reasons applications fail.
Anticipated Length of Stay
State a specific end date or period, up to the three-year maximum per TN grant. If the assignment is shorter, say so. The length stated in the letter frames the authorized period the officer can grant on the I-94.
Educational Qualifications or Credentials
Identify the degree, diploma, license, or experience that qualifies the applicant for the named profession, and tie it to what Appendix 2 actually requires. Most listed professions require at least a baccalaureate. A handful accept alternatives: Computer Systems Analyst, Graphic Designer, Hotel Manager, Industrial Designer, and Interior Designer can qualify with a post-secondary diploma or certificate plus three years of experience, and Management Consultant can qualify through five years of consulting experience documented by a professional credential or statement, even without a degree.5NAFSA: Association of International Educators. Appendix 2 Professionals Where a baccalaureate is required, experience cannot substitute. The FAM is explicit.4U.S. Department of State Foreign Affairs Manual. 9 FAM 402.17 USMCA Professionals – TN and TD Visas
Arrangements for Pay
Spell out the salary or wage, how it will be paid, and by whom. Omitting compensation is one of the fastest ways to get turned away. Put the number in writing under a labeled heading so the officer doesn’t have to hunt for it.
Extra Care for Management Consultants
Management Consultant is one of the most common TN categories and one of the most frequently challenged. The real question is whether the applicant will provide genuine consulting services or simply fill a regular staff position. A management consultant’s work must be directed toward improving a business’s managerial, operating, or economic performance by analyzing and resolving strategic problems. If the letter describes what reads as a permanent operational role inside the company, the application will be denied.
The employment structure matters as much as the duty language. An independent contractor providing advisory services to a client company can qualify. A management consultant employed directly can also qualify, but only if the employer’s primary business is providing consulting services and the consultant will serve the employer’s outside clients. An applicant hired as a regular employee of a non-consulting company to perform internal work will struggle at the border no matter how the letter frames the duties.
How the Letter Should Look
Print the letter on official company letterhead. That alone signals a real business is behind the offer. The signer should be someone with actual hiring authority for the position, with their name, title, direct phone number, and email address under the signature. Officers sometimes call the employer to verify details, and a letter signed by someone who can’t answer basic questions about the role undermines credibility.
Immigration practitioners consistently recommend an original ink signature over a digital or photocopied one. No federal regulation mandates a wet signature, but CBP officers have broad discretion to question document authenticity, and a letter that looks photocopied or electronically assembled invites extra scrutiny. Bringing the original signed letter rather than a scan is low-effort insurance against an avoidable delay.
What the Letter’s Claims Have to Be Backed By
The letter makes assertions. The rest of the packet proves them. Treat the whole set as a paper trail where every claim in the letter has a corresponding document behind it.
- Original diplomas for the degree that qualifies the applicant for the named profession, plus official transcripts showing the course of study and conferral date. Having originals of other degrees is useful, but the qualifying degree matters most.
- A formal credential evaluation if the qualifying degree was earned outside North America, demonstrating equivalency to a U.S. baccalaureate or the appropriate degree level.6U.S. Citizenship and Immigration Services. TN USMCA Professionals
- A copy of any required professional license. Registered Nurse, Pharmacist, Lawyer, and Architect may need state licensure to practice. The U.S. Embassy in Canada notes that proof of licensure is not required to receive a TN visa, but presenting it strengthens the application.7U.S. Embassy & Consulates in Canada. TN Visa
- Detailed experience letters for categories that accept experience in lieu of a degree, such as Management Consultant with five years of experience. These letters should describe specific projects and responsibilities, not just confirm dates of employment.
What the Letter Cannot Describe
Two situations will defeat a TN application no matter how carefully the five elements are written up.
The first is self-employment. The letter must come from a genuine employer, not from a company the applicant owns or controls. The FAM states plainly that an applicant cannot qualify for TN status to establish a business or practice in the U.S. where the professional will be self-employed, including by providing services to a corporation the applicant is the sole or controlling shareholder of.4U.S. Department of State Foreign Affairs Manual. 9 FAM 402.17 USMCA Professionals – TN and TD Visas The employer must be a bona fide U.S. or foreign entity, not a shell set up to disguise self-employment.
The second is permanent intent. TN is a non-dual-intent classification. USMCA defines temporary entry as entry “without the intent to establish permanent residence,” and the standard presumption under INA 214(b) that every applicant intends to immigrate applies fully to TN cases. The letter shouldn’t describe the job in terms that read as a permanent placement. The FAM allows some flexibility: an intent to immigrate at some unspecified future time, unconnected to the current trip, doesn’t automatically disqualify an applicant, and repeated TN renewals leading to a long U.S. stay can still be considered temporary when there is no immediate intent to immigrate.4U.S. Department of State Foreign Affairs Manual. 9 FAM 402.17 USMCA Professionals – TN and TD Visas
Writing for Renewals and New Employers
Each new period of TN status needs its own letter. Extensions filed on Form I-129 require a fresh letter describing the continuing employment and evidence that any required professional license is still valid.8U.S. Citizenship and Immigration Services. Chapter 4 – Extension of Stay and Change of Status A previous employer’s letter is useless for a new job; the new employer has to write its own covering all five regulatory elements. A transfer within the same corporate employer to perform the same work doesn’t require a new letter, but a move to a separately incorporated subsidiary or affiliate does.
Why Letters Fail
Most denials trace back to a mismatch between what the letter says and what the evidence shows. The recurring problems are:
- The job doesn’t correspond to any profession in Appendix 2, or the letter uses a creative title that doesn’t map to a listed category.
- The duty description is too vague for the officer to tell whether the work actually qualifies as professional-level activity under the named category.
- The applicant lacks the degree, license, or experience required for the listed profession, and the packet doesn’t document the alternative qualifications.
- The officer suspects immigrant intent, often triggered by a long history of TN renewals combined with weak ties to the home country.
- The letter omits one of the five required elements, or supporting documents such as transcripts or credential evaluations are missing.
A denial at a Canadian port of entry isn’t the end of the road. The applicant can reapply with a revised letter and stronger documentation, addressing the specific deficiency the officer flagged. For any case with real complexity or risk, filing through USCIS gives the employer the safety valve of a Request for Evidence before a final decision.